It is the 50th largest municipality in Sweden by population size, which exceeded 50 000 during May 2024.

In 1974 a minor part (situated on the island of Hisingen) was transferred to Gothenburg Municipality.

On an island in the river, the medieval Bohus Fortress faces the city of Kungälv.

This is a demographic table based on Kungälv Municipality's electoral districts in the 2022 Swedish general election sourced from SVT's election platform, in turn taken from SCB official statistics.

[4] In total there were 48,219 residents, including 36,298 Swedish citizens of voting age.